LM386 Amplifier | Electronic Project Circuits

Posts Tagged ‘LM386 amplifier’

Amplifier 500 mW with ic LM386N

This circuit number LM386 IC is used as the IC, which is popular is that it has. It is a simple circuit. Less equipment items. Suitable for use or used in small trials.
The properties of the IC can be used from 4V-12V power supply for low current at 50 mA only. And the frequency response from 40Hz – 100 kHz rate of expansion of 46 dB and distortion.
Less than 1%.
When entering the power supply light LED1 circuit to tell the operating environment of the circuit. C6 and C7, with a page filter to smooth then be entered through one input sound signal.
C1 coupling signal protection dc voltage noise in circuit to the sound signal that is transmitted through VR1 for controller level reputation of sound signal and then sent to the input to pin 3 of IC1.
boost up output at pin 5 through C5 for protection dc voltage and meet the low frequency better and send out put speakers. The C4 and R1 is acting eliminate noise signal out and the pin 1 of IC will have a jumper for. to access the C3 to boost up rate increase in case the circuit to be used to boost up signal is very small.

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Categories: Power Amplifier Tags: LM386 amplifier, small audio amp

Pre mic audio amplifier with ic LM386

This circuit be signal sound expansion from condenser microphone give with small-sized loudspeaker. It compose the importance is part pre mic use transistor just one enlarge sound signal gives the power goes up change come to a part amplifier with the integrated circuit LM386 utter go out give a loudspeaker.
When feed 9V power supply reach the circuit. The MIC1 and Q1 which be part pre mic, by mic will take sound signal has come in then deliver Q1 enlarge a signal has power size goes up to go out the way collector pin (C) change C2 coupling signal. Then deliver with VR1 for fine signal sound level gives with Input of IC1. Which IC1 number LM386 be the integrated circuit amplifies 1 watt size has pin 3 are input and have C3 will eradicate source noise with input signal discharge down ground. When amplify finished will export come to the way output pin 5 by have C5 and R5 eradicate a signal takes to stir go out sound signal will have that to change go to still. The C6 coupling signal and enhance sound quality of low frequency improve. Before reach a loudspeaker makes a noise to come out.